package org.bug2222.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import lombok.extern.slf4j.Slf4j;
import org.apache.ibatis.annotations.Param;
import org.bug2222.reggie.common.R;
import org.bug2222.reggie.dto.DishDto;
import org.bug2222.reggie.entity.Category;
import org.bug2222.reggie.entity.Dish;
import org.bug2222.reggie.entity.DishFlavor;
import org.bug2222.reggie.service.CategoryService;
import org.bug2222.reggie.service.DishFlavorService;
import org.bug2222.reggie.service.DishService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;

import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

@Slf4j
@RestController
@RequestMapping("/dish")
public class DishController {
    @Autowired
    private DishService dishService;
    @Autowired
    private DishFlavorService dishFlavorService;
    @Autowired
    private CategoryService categoryService;
    @Autowired
    private RedisTemplate redisTemplate;

    /**
     * 新增菜品
     * @param dishDto
     * @return
     */
    @PostMapping
    public R<String> save(@RequestBody DishDto dishDto){

        log.info(dishDto.toString());

        dishService.saveWithFlavor(dishDto);

        return R.success("新增菜品成功");
    }

    @GetMapping("/page")
    public R<Page> page (int page,int pageSize,String name){
        //构造分页构造器对象
        Page<Dish> dishPage = new Page<>(page, pageSize);
        Page<DishDto> dishDtoPage = new Page<>(page, pageSize);

        //条件构造器
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        //添加过滤条件
        queryWrapper.like(name!=null,Dish::getName,name);
        dishService.page(dishPage,queryWrapper);

        //对象拷贝
        BeanUtils.copyProperties(dishPage,dishDtoPage,"records");

        List<Dish> records = dishPage.getRecords();
        List<DishDto> list =  records.stream().map((item)->{
            DishDto dishDto = new DishDto();

            BeanUtils.copyProperties(item,dishDto);

            Long categoryId = item.getCategoryId();
            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);

            if (category!=null){
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);

            }

            return dishDto;
        }).collect(Collectors.toList());


        dishDtoPage.setRecords(list);

        return R.success(dishDtoPage);
    }


    /**
     * 根据id查询菜品信息和对应的口味信息
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public R<DishDto> get(@PathVariable Long id){

        DishDto dishDto = dishService.getByIdWithFlavor(id);

        return R.success(dishDto);

    }

    /**
     * 修改菜品
     * @param dishDto
     * @return
     */
    @PutMapping
    public R<String> update(@RequestBody DishDto dishDto){

        log.info(dishDto.toString());

        dishService.updateWithFlavor(dishDto);

        //清理所有的缓存数据
//        Set keys = redisTemplate.keys("dish_*");
//        redisTemplate.delete(keys);

        //清理某个分类下面的菜品缓存数据
        String key = "dish_"+dishDto.getCategoryId()+"_1";
        redisTemplate.delete(key);

        return R.success("修改菜品成功");
    }

    @PostMapping("/status/{status}")
    public R<String> status(@RequestParam List<Long> id ,@PathVariable int status){
        log.info("id:{},status:{}",id,status);

        dishService.updateWithStatus(id, status);

        return R.success("停售/起售：成功");
    }

    @DeleteMapping
    public R<String> delete(@RequestParam List<Long> ids){
        dishService.remove(ids);
        return R.success("删除成功");
    }


//    /**
//     * 根据条件查询对应的菜品数据
//     * @param dish
//     * @return
//     */
//    @GetMapping("/list")
//    public R<List<Dish>> list(Dish dish){
//
//        //构造查询条件
//        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
//        queryWrapper.eq(dish.getCategoryId()!=null,Dish::getCategoryId,dish.getCategoryId());
//        queryWrapper.eq(Dish::getStatus,1);
//        //添加排序条件
//        queryWrapper.orderByAsc(Dish::getSort).orderByAsc(Dish::getUpdateTime);
//
//        List<Dish> list = dishService.list(queryWrapper);
//        return R.success(list);
//    }

    /**
     * 根据条件查询对应的菜品数据
     * @param dish
     * @return
     */
    @GetMapping("/list")
    public R<List<DishDto>> list(Dish dish){
        List<DishDto> dishDtoList = null;
        String key = "dish_"+dish.getCategoryId()+"_"+dish.getStatus();

        //先从redis中获取缓存
        dishDtoList = (List<DishDto>)redisTemplate.opsForValue().get(key);

        if (dishDtoList!=null){
            //如果存在，直接返回
            return R.success(dishDtoList);
        }
        //如果不存在，需要查询数据库

        //构造查询条件
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(dish.getCategoryId()!=null,Dish::getCategoryId,dish.getCategoryId());
        queryWrapper.eq(Dish::getStatus,1);
        //添加排序条件
        queryWrapper.orderByAsc(Dish::getSort).orderByAsc(Dish::getUpdateTime);

        List<Dish> list = dishService.list(queryWrapper);

        dishDtoList =  list.stream().map((item)->{
            DishDto dishDto = new DishDto();

            BeanUtils.copyProperties(item,dishDto);

            Long categoryId = item.getCategoryId();
            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);

            if (category!=null){
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }
            //当前菜品id
            Long dishId = item.getId();
            LambdaQueryWrapper<DishFlavor> lambdaQueryWrapper = new LambdaQueryWrapper<>();
            lambdaQueryWrapper.eq(DishFlavor::getDishId,dishId);
            List<DishFlavor> dishFlavors = dishFlavorService.list(lambdaQueryWrapper);

            dishDto.setFlavors(dishFlavors);

            return dishDto;
        }).collect(Collectors.toList());

        //将查询到的菜品数据缓存到redis
        redisTemplate.opsForValue().set(key,dishDtoList,60, TimeUnit.MINUTES);

        return R.success(dishDtoList);
    }

}
